The binding sites of Iron atom in the structure of Sperm Whale Metaquomyoglobin Proximal Histidine Mutant H93G With 1-Methylimidazole As Proximal Ligand. (pdb code 1duo). This binding sites where shown with 5.0 Angstroms radius around Iron atom. The 1duo structure was solved by D.BARRICK, F.W.DAHLQUIST, with X-Ray Crystallography technique, brief refinement statistics is given in the table below: